Thermoelastic Martensite Transformations and the Properties of Ultrafine-Grained Ni54Mn20Fe1Ga25 Alloys Obtained by Melt Quenching


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Abstract

Studies of structural and phase transformations in the cast and melt-quenched ferromagnetic four-component alloy Ni54Mn20Fe1Ga25 were performed using transmission and scanning electron microscopy and X-ray diffraction, The obtained data have been compared with the results of studies of physical characteristics (electrical resistance, thermopower, magnetic susceptibility, magnetization, and temperature coefficients of linear expansion and relative elongation ΔL/L measured by the method of dilatometry) in the temperature range of 2–870 K. This work has established the effects of quenching on the microstructure, magnetic state, critical temperatures, and specific features of thermoelastic martensitic transformations in the alloy.

About the authors

E. B. Marchenkova

Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Email: pushin@imp.uran.ru
Russian Federation, Ekaterinburg, 620108

V. G. Pushin

Institute of Metal Physics, Ural Branch, Russian Academy of Sciences; Ural Federal University Named after the First President of Russia B.N. Yeltsin

Author for correspondence.
Email: pushin@imp.uran.ru
Russian Federation, Ekaterinburg, 620108; Ekaterinburg, 620002

V. A. Kazantsev

Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Email: pushin@imp.uran.ru
Russian Federation, Ekaterinburg, 620108

A. V. Korolev

Institute of Metal Physics, Ural Branch, Russian Academy of Sciences; Ural Federal University Named after the First President of Russia B.N. Yeltsin

Email: pushin@imp.uran.ru
Russian Federation, Ekaterinburg, 620108; Ekaterinburg, 620002

N. I. Kourov

Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Email: pushin@imp.uran.ru
Russian Federation, Ekaterinburg, 620108

A. V. Pushin

Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Email: pushin@imp.uran.ru
Russian Federation, Ekaterinburg, 620108

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